First, there is absolutely no difference between
HSV-1 and HSV-2 in the appearance of lesions, amount of pain, overall severity, or anything else. There is zero basis for your provider's judgment that you have HSV-1 based on how the lesions look or feel. Second, oral herpes due to HSV-2 is rare; almost all cases are due to HSV-1. Therefore, if your only possible exposure was by oral sex, probably that is the cause. In other words, your doc probably is right, but for the wrong reason.